Guessing the stats will show lower than $1M typical claims for rideshare accidents.

But... I wouldn't want to be an outlier i.e. serious injuries. That would require suing the driver that has few/no assets.

Uber/Lyft sure as hell ain't going to let you sue them for a dime.

Lets not forget the hometown of the UAW was Flint, MI. Detroit used to be the richest city in the US by a very significant margin; now most car factories aren't even in Michigan. People may claim otherwise but good employees don't want to work for unions because it limits career growth and innovation, while companies don't want to deal with an adversarial unit within the company. Any private sector unionization is bad, even if this is just going after rideshare drivers now.

How does Waymo factor into this equation?

The tech giants only capitulated because they think that there is a reasonable chance physical drivers will be unnecessary in the near future, thus making all of this a moot point.

This wouldn't have happened before Waymo's demonstrable successes.